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When were Christmas lights invented?
Christmas lights were first invented in 1882 by Edward H. Johnson, an associate of Thomas Edison. Johnson hand-wired 80 red, white, and blue light bulbs and displayed them on a rotating Christmas tree in his home in New York City.
Where is the load on a string of Christmas lights?
The load on a string of Christmas lights is typically located in the bulb itself. Each bulb is designed to produce light and consumes power when electricity passes through it. The collective load of all the bulbs on the string determines the amount of power required to illuminate the lights.
Why when one of the bulbs goes out on your Christmas tree lights then they all go out?
These are old generation lights. They are connected in series with each other. This means if one of the filaments in any one of the bulbs opens the circuit current flow stops. For example if each bulb is rated at 2 volts each then a string of 60 bulbs can be on a 120 volt circuit. lamps connected in series, because each bulbs filament resistance is the same, will will drop a voltage across each bulb by the total number of bulbs in the string divided into the supply source voltage. 120 volts / 60 bulbs = 2 volts per bulb.Newer sets of lights have a have a spring mounted in each lamp. When any lamp filament opens a spring is released and shorts out the two wires where the filament was. This allows the string of lights to remain operable. This has a drawback in that as more lights burn out the voltage becomes higher across the other bulbs. Eventually the bulbs will start burning out faster and faster as the voltage across each bulb becomes higher and higher. Use the equation above to see this fact.Christmas string lights today use LED bulbs which last many times longer than an incandescent bulb in the string set.
A package of 200 heavy duty Christmas lights says to use 2.5 volt bulbs as replacements. Why do the standard 2.5 bulbs found in stores burn more dimly than the original bulbs in the string?
Not all 2.5V bulbs will have the same wattage, any more than all normal 120 or 240V ones do. The wattage is current I x voltage V. Since by Ohm's law V = I x R, or I = V/R, wattage = Vsquared/R. Therefore for a given value of V, the bulb is made brighter by reducing R, the resistance of the filament.
What could cause my 1989 Mercury Topaz's brake lights to not work when all the bulbs are good?
A defective brake light switch could cause the problem. Also a defective turn signal switch could also. The brake lights work through the turn signals. It cancels the brake light so that the turn signal can work.
Lights go out when turn on high beams?
Burnt out bulbs? Defective dimmer switch?
Where can I find replacement bulbs for Christmas lights?
You can find replacement bulbs for Christmas lights at most hardware stores, home improvement stores, or online retailers that sell holiday decorations.
Where can I find replacement bulbs for my Christmas lights?
You can find replacement bulbs for your Christmas lights at most hardware stores, home improvement stores, or online retailers that sell holiday decorations.
Quite often on a Christmas tree if one light bulb burns out none of the lights work until the defective bulb is replaced The reason for this is that the bulbs are connected?
Its because it is in a parallel circuit and the dead bulb stops the power from continuing on to the other bulbs on the circuit.
What is the difference between C7 and C9 Christmas lights?
The C7 range of christmas lights are 5 Watt bulbs which are 2.125 inches tall and 0.875 inches wide. The C9 range of christmas lights are 6 watt bulbs which are 2.875 inches tall and 1.125inches wide.
Where can I find Christmas lights replacement bulbs for my holiday decorations?
You can find Christmas lights replacement bulbs at most hardware stores, home improvement stores, or online retailers that sell holiday decorations.
Where can I find replacement bulbs for LED Christmas lights?
You can find replacement bulbs for LED Christmas lights at most hardware stores, home improvement stores, or online retailers that sell holiday decorations and lighting supplies.
What could be the reason your back up lights dont work even with new bulbs?
Defective back up switch.
How can lighted Christmas decorations be used to celebrate Halloween?
Using christmas lights for halloween is somewhat confusing to me. What comes to mind is maybe placing all orange bulbs in a strand of christmas lights to make them halloween lights.
What would be the cause of no tail lights and no cluster lights when the fuses and bulbs are working?
If the parking/tailight fuse is good - then it may be a bad headlight switch No tail lights but the bulbs are working? Please explain.
How long does a christmas bulb last?
Christmas bulbs usually last for a very long time. Especially LED bulbs. The LED bulbs usually last around 75,000 hours. But conventional Christmas lights will only last 1,000 to 2,000 hours.
1998 Volvo S-70 parking lights won't work?
It could be as simple as bulbs burned out or your switch could be defective.
